Document and Entity Information - shares
6 Months Ended
Oct. 26, 2019
Nov. 13, 2019
Cover page.    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Oct. 26, 2019  
Document Transition Report false  
Entity File Number 1-9656  
Entity Registrant Name LA-Z-BOY INCORPORATED  
Entity Incorporation, State or Country Code MI  
Entity Tax Identification Number 38-0751137  
Entity Address, Address Line One One La-Z-Boy Drive,  
Entity Address, City or Town Monroe,  
Entity Address, State or Province MI  
Entity Address, Postal Zip Code 48162-5138  
City Area Code 734  
Local Phone Number 242-1444  
Title of 12(b) Security Common Stock, $1.00 Par Value  
Trading Symbol LZB  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   46,382,907
Entity Central Index Key 0000057131  
Current Fiscal Year End Date --04-27  
Document Fiscal Year Focus 2020  
Document Fiscal Period Focus Q2  
Amendment Flag false